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Mastering Django: Core

You're reading from   Mastering Django: Core The Complete Guide to Django 1.8 LTS

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Product type Paperback
Published in Dec 2016
Publisher
ISBN-13 9781787281141
Length 694 pages
Edition 1st Edition
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Author (1):
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Nigel George Nigel George
Author Profile Icon Nigel George
Nigel George
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Table of Contents (33) Chapters Close

Mastering Django: Core
Credits
About the Author
www.PacktPub.com
Preface
1. Introduction to Django and Getting Started FREE CHAPTER 2. Views and URLconfs 3. Templates 4. Models 5. The Django Admin Site 6. Forms 7. Advanced Views and URLconfs 8. Advanced Templates 9. Advanced Models 10. Generic Views 11. User Authentication in Django 12. Testing in Django 13. Deploying Django 14. Generating Non-HTML Content 15. Django Sessions 16. Djangos Cache Framework 17. Django Middleware 18. Internationalization 19. Security in Django 20. More on Installing Django 21. Advanced Database Management Model Definition Reference Database API Reference Generic View Reference Settings Built-in Template Tags and Filters Request and Response Objects Developing Django with Visual Studio

What's a settings file?


A settings file is just a Python module with module-level variables. Here are a couple of example settings:

ALLOWED_HOSTS = ['www.example.com'] DEBUG = False DEFAULT_FROM_EMAIL = '[email protected]' 

Note

If you set DEBUG to False, you also need to properly set the ALLOWED_HOSTS setting.

Because a settings file is a Python module, the following apply:

  • It doesn't allow for Python syntax errors
  • It can assign settings dynamically using normal Python syntax, for example:
            MY_SETTING = [str(i) for i in range(30)] 
    
  • It can import values from other settings files

Default settings

A Django settings file doesn't have to define any settings if it doesn't need to. Each setting has a sensible default value. These defaults live in the module django/conf/global_settings.py. Here's the algorithm Django uses in compiling settings:

  • Load settings from global_settings.py
  • Load settings from the specified settings file, overriding the global settings as necessary

Note that a settings file should not import from global_settings, because that's redundant.

Seeing which settings you've changed

There's an easy way to view which of your settings deviate from the default settings. The command python manage.py diffsettings displays differences between the current settings file and Django's default settings. For more, see the diffsettings documentation.

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